I'm working on a 98 monte carlo 3.1, guy is complaining about braking vibrations, did the inspection and saw someone installed new factory pads, shoes, didn't do anything with the drums or rotors, also found the left front brake caliper was sticking, so i replaced the caliper, front rotors, and rear drums, I test drove the car and when braking the pedal still pulsates, so I then measured the runout on all the hubs and all are okay, did I over look anything?